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<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>自定义new与instanceof工具函数</title>
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<body>
  <script>
    /*
    1. 自定义new工具函数
        语法: newInstance(Fn, ...args)
        功能: 创建Fn构造函数的实例对象
        实现: 创建空对象obj, 调用Fn指定this为obj, 返回obj
    2. 自定义instanceof工具函数
        语法: myInstanceOf(obj, Type)
        功能: 判断obj是否是Type类型的实例
        实现: Type的原型对象是否是obj的原型链上的某个对象, 如果是返回tru, 否则返回false
    */
  </script>
  <script src="../dist/sybUtils.js"></script>
  <script>
    function Person(name, age) {
      this.name = name
      this.age = age
      // return {}
      // return []
      // return function (){}
      // return 1
      // return undefined
    }

    const p = new Person('tom', 12)
    console.log(p)

    const p2 = aUtils.newInstance(Person, 'Jack', 13)
    console.log(p2, p2.constructor)
  </script>
  <script>
    console.log(aUtils.myInstanceOf(p, Object))
    console.log(aUtils.myInstanceOf(p, Person))
    console.log(aUtils.myInstanceOf(aUtils.myInstanceOf, Function))
    console.log(aUtils.myInstanceOf(p, String), aUtils.myInstanceOf(p, Function))
  </script>
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